U6820BM-FP ATMEL [ATMEL Corporation], U6820BM-FP Datasheet

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U6820BM-FP

Manufacturer Part Number
U6820BM-FP
Description
Dual Quad BCDMOS Driver IC
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
Features
Description
The U6820BM is a driver interface in BCDMOS technology with 8 independent driver
stages having a maximum current capability of 50 mA each. Its partitioning into 4
high-side and 4 low-side driver stages allows an easy connection of either 4 half-
bridges or 2 H-bridges on the pc board. The U6820BM communicates with a micro-
controller via an 8-bit serial interface. Integrated protection against short circuit and
overtemperature give added value. EMI protection and 2-kV ESD protection together
with automotive qualification referring to conducted interference (ISO/TR 7637/1)
make this IC ideal for both automotive and industrial applications.
Figure 1. Block Diagram
STATUS
Four Short-circuit-protected High-side Drivers with a Maximum Current Capability of
50 mA Each
Four Short-circuit-protected Low-side Drivers with a Maximum Current Capability of
50 mA Each
ON Resistance High Side R
ON Resistance Low Side R
Short-circuit Detection of Each Driver Stage
Disabling of Driver Stages in the Case of Short-circuit and Overtemperature Detection
Independent Control of Each Driver Stage via an 8-bit Shift Register
Status Output Reports Short-circuit Condition
Status Output Reports when All Loads Are Switched Off
Timing of Status Output Reset Signalizes Failure Mode
Temperature Protection in Conjunction with Short-circuit Detection
CLK
CS
DI
12
11
13
14
H
S
4
H
S
3
Input Register
H
S
2
GND
6
V
H
S
V
1
CC
CC
4
CC
S
L
4
L
S
3
S
2
L
on
on
L
S
1
< 7
< 10
Current
Current
limiter
limiter
Versus Total Temperature Range
16
V
Versus Total Temperature Range
HS4
CC
LS4
15
Control
logic
Current
Current
limiter
limiter
HS3
9
LS3
10
Current
limiter
Current
limiter
Thermal protection
HS2
8
Power-on reset
LS2
7
Current
Current
limiter
limiter
1
HS1
LS1
2
V
V
CC
CC
3
5
GND S
V S
Dual Quad
BCDMOS
Driver IC
U6820BM
Rev. 4527A–BCD–03/02
1

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